The flavor of meats and vegetables is volatile, and much of it can be carried off by escaping steam, as is demonstrated by the odors which sometimes pervade the house. To prevent the latter, and also to make the article tender and retain all its flavor, the pot should be covered and the water kept at the simmering point only.
Vegetables. An exception to this rule is made in the cases of cabbage and cauliflower. These strong-flavored vegetables will be much less objectionable when cooked in rapidly boiling water in open vessels (see page [212]). Green vegetables should be boiled in open vessels, as high heat destroys their color. Meat. All meats should be well tied and skewered, to keep them in good shape while boiling, and, when possible, be placed with the bone side up, so if any scum settles it will not spoil the appearance of the dish. Fish. For fish a little vinegar should be put into the water, as it hardens the meat and helps to prevent its falling apart (see page [113]).
Salt water is used where the object is to keep the flavors in, fresh water where it is to draw them out as in soup, where the salt is not added until the cooking is completed. The rule of not piercing meat, thus letting out its juices, applies to boiling as well as to other methods of cooking. Fifteen minutes to the pound is the rule for mutton or tender meat, a much longer or indefinite time for tough meat.
Ham is done when the skin peels off easily.
The scum should be taken off the pot when boiling meat.
Milk boils at 196° and easily burns, therefore it is safer to use a double boiler for anything containing milk. When using a double boiler, the liquid in the inner pan is scalded when the water in the outside vessel boils.
BAKING
Asbestos paper. The baking of many articles is a more important matter than the mixing. There are no definite tests for ovens, therefore one has to learn by experience and careful watching the capabilities or faults of the ovens used. A common trouble is from not having them thoroughly cleaned of the ashes which settle under the ovens and prevent the heat reaching the bottom part. It is usual to have them hotter on the fire side. In this case it is necessary to turn frequently the articles being baked, or, where this cannot be done, to interpose a screen to protect them from burning. Asbestos paper, which is now sold at very low cost at house-furnishing stores, is a convenient thing to place against the side of the oven, or on the shelf of the oven if the excessive heat is on top. A tin, or a piece of brown paper, will, however, ordinarily serve the purpose. Directions for baking bread and cake are given at the heads of those chapters.
To lower the heat of an oven, if closing the damper is not sufficient, open the lid of the range over the oven a little way. Sometimes a pan of cold water put on the shelf of the oven will effect the purpose. When baking meats, the oven should be very hot at first, and after the meat is seared the heat should be lowered, so the cooking will be done slowly.